mega328(GM328) Transistor Tester

Original Development Site:

GM238 User Manual -PDF (local)
GM328 DIY Kits

-Digital LCD display for easy readings, can display measured data and graphics
-Rotary switch control, a key measurement for convenient use
-Main chip is the DIP, easy for electronic enthusiasts to DIY or update the main chip
-Use 9V battery(not included), can also use DC power(DC 6.8-12V)
-Automatic shutdown, shutdown current is only about 20nA
-Automatically detects NPN and PNP transistors, FET, diodes, dual diode, thyristor, SCR,automatic identification of the transistor pinout.
-Test NPN and PNP transistor common-emitter current amplification factor,
the base-emitter threshold voltage, off the collector - emitter leakage current.
-Support 2 resistors measurement, show its positive and negative, on-state voltage.
-Resistance measurement maximum resolution 0.01Ω, can be measured up to 50MΩ.
-Automatically test the pins of a component and show on the display.
-Measure FET gate threshold voltage and gate capacitance.
-For the following 2100Ω resistor while measuring its inductance measuring range from 0.01mH - 20H.
-Can be used as signal generator and frequency meter: frequency range from 1Hz-2MHz
and can generate 1%-99% PWM(pulse width modulation) signals

Display: 160*128 LCD
Power Supply :1 * 9V Battery(not included); DC 6.8-12V
Current Approx. 30mA
Resistance Measurement Max. 50MΩ
Resistance Resolution 0.01Ω
Capacitance Measurement 25pF~100mF
Capacitance Resolution 1pF
DC Voltage Measurement Up to 50V
Screen Size Approx. 3.7 * 3cm / 1.45 * 1.18in
PCB Size Approx. 7.8 * 6.2cm / 3.1 * 2.44in

With optional Clear Case Cover:
Dimensions: approx.83 x 83 x 30 mm


Other References

Instructables Writeup:


Glenn Lyons VK4PK
Ver:gnl20180615 - pre published v0.9